Keyword: «heat transfer»

Convective heat exchange plays an important role in the heating systems of buildings and providing comfortable living conditions for people. The program of physical education for students specializing in building does not consider this circumstance; therefore, even a fragmentary consideration of this problem seems to be useful. The article proposes an adjustment of the methodological support of physical education for students of the building specialty due to the inclusion the physical fundamentals of convective heat exchange in the lecture fragment of the course, taking into account their absence in traditional curricula and recommended literature. Alternative solutions for this problem are also proposed here.

The work is devoted to a mathematical modeling of the decomposition of natural gas hydrate in compacted sand samples under decompression. The 1D mathematical model of the process includes equations of mass and heat balance, equation of gas state, equation of gas flow and empirical dependencies related to the kinetics of hydrate dissociation in a porous medium. An empirical dependence of the equilibrium pressure of natural gas hydrate on temperature in a porous medium is used. As a result of the simulation, the distributions of the main physical parameters in the sample and their evolution over time were obtained.

The calculation of heat access through external fences is an important part of the task of predicting the summer thermal regime of a building under a transparent dome, the interest in the construction of which in the northern regions has increased recently. The paper considers a relatively simple model of heat transfer through a wall with a semitransparent screen suitable for engineering calculations, which allows taking into account the greenhouse effect. The influence of ventilation in the dome space on heat access through the enclosing structure was estimated for the selected values of external parameters: external temperature and solar radiation.